EP1037508A1 - Inductive cooktop with temperature control - Google Patents

Inductive cooktop with temperature control Download PDF

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Publication number
EP1037508A1
EP1037508A1 EP00810195A EP00810195A EP1037508A1 EP 1037508 A1 EP1037508 A1 EP 1037508A1 EP 00810195 A EP00810195 A EP 00810195A EP 00810195 A EP00810195 A EP 00810195A EP 1037508 A1 EP1037508 A1 EP 1037508A1
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EP
European Patent Office
Prior art keywords
sensor
food
inductive
cooker
output signal
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EP00810195A
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German (de)
French (fr)
Inventor
Christian Fuchs
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Inducs AG
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Inducs AG
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/07—Heating plates with temperature control means

Definitions

  • the present invention relates to an inductive cooker and a method for Heating of food according to the generic terms of the independent Claims.
  • the temperature and the Temperature control significantly affects the quality of the food.
  • meat, Fish and sauces must be processed in a very narrow temperature range be so that the optimal taste development comes into its own.
  • Inductive cookers require monitoring or regulation of the temperature.
  • a Temperature measurement on the underside of a ceramic or glass plate as a carrier for pan and food Because of the material thickness and bad Thermal conductivity of this plate takes a long time to change Temperature is registered. This is a major disadvantage since the food is under Possibly overheated long before an operator or any existing operator Temperature control loop can intervene effectively.
  • the state of the art Well-known inductive cookers use the special, inertia Characteristic of inductive heating is not optimal. In addition, usually the measured temperature is not displayed directly, so that the operator is only vaguely Can make ideas about the effective temperature of the food.
  • the technical problem is solved in particular by the fact that a Temperature change of the food to be measured measured without delay, transmitted, is evaluated and displayed.
  • the signaling Sensors are attached so that they are subject to exactly the same changes like the food. Insulating shielding by other elements is bad and has a delaying effect on the result.
  • the invention disclosed here solves the task in a simple way. This is how signaling sensors become placed that they are subject to the same influences as the food. In practice it means that they are "cooked”.
  • the signal transmission between Sensor and an evaluation unit is optimized so that no disadvantage Restriction results.
  • the relevant data is stored on a Display unit so visually represented that it is clear and for the operator updated without delay as actual values are recognizable.
  • the operator has preferably also the possibility of entering a target value for the temperature, which can also be displayed.
  • the relevant data are stored in one Target / actual comparison compared and for temperature control used.
  • the signaling sensors deliver at least one electrical signal, which on the one hand to control a temperature display and on the other hand to regulate the Serve cooking process.
  • a microprocessor By actively regulating the cooking process by means of A microprocessor can be an optimal one from a control point of view seen stable system can be achieved.
  • the adjusting mechanism the control loop is advantageously designed with a very short reaction time, without the risk of the entire system becoming unstable or even tends to rock.
  • the signaling sensors are advantageously in the food or placed immediately next to it. If it is a liquid cooked food, such as For example, a sauce or a cream, the sensors are in a measuring probe this inserted. With solid food, such as meat, the sensors in the Inside the food or in the area of the surface of the food appropriate.
  • the measurement signals generated by the sensors typically relate to the Temperature, humidity or other parameters.
  • the measurement signals are on a microprocessor-controlled electronics hand over the resulting target / actual deviation,
  • the manipulated variable and display value are calculated.
  • the user determines by Specification of the setpoint of the temperature that is shown on a display. On the same or another display shows the effectively measured temperature of the Cookware held. To guarantee optimal success of the food, If necessary, several sensors are used.
  • the performance of the inductive Cooking range is shown on a separate display, so the user turns on at a glance recognizes how much the current cooking output compared to maximum cooking power is.
  • the sensor signals are transmitted between the sensor and the evaluation unit in different ways.
  • the sensors are connected by cable to the Evaluation and display unit connected. Through this cable the sensors supplied with power, and transmit the sensor signal (s).
  • the Data is transmitted as an analog or digital signal.
  • the cables of the Sensors are advantageously connected to the cooker by means of plugs. If the sensors are not connected to the cooker, this is done Temperature monitoring via a sensor that is permanently connected to the cooker is advantageously attached in the region of the pan base. This sensor usually also serves as overheating protection for the cooker.
  • inductive cooking stoves as Alternative to the cable connections a particularly advantageous form of Data transmission between sensor and evaluation unit resp. Display unit used, which can also make targeted use of the inductive magnetic field.
  • the data transmission may have no restrictive effect.
  • the data is at this variant without a direct cable connection, e.g. B. by means of analog or digital Radio signals transmitted.
  • the at least one sensor which the relevant measurement parameters are determined, coupled to at least one transmission unit.
  • This transmission unit transmits a signal which corresponds to the measured quantities clearly correlated.
  • the transmitted signal is then replaced by a Recipient recorded and after a suitable preparation of the evaluation, display and control supplied.
  • the transmitter unit is supplied with energy, for example, via energy stores such as batteries or accumulators.
  • energy stores such as batteries or accumulators.
  • Another very elegant and special An advantageous possibility is the targeted use of the anyway existing inductive field by a coil. This coil is targeted like this placed that a voltage is induced in it by the inductive field. This Voltage as an energy supply for recording the measured variables and for Data transmission used.
  • the transmitter units and the receiver unit are designed so that several Measurement signals are differentiated and evaluated at the same time. So it is possible use different sensors at the same time and the signals of the individual Differentiate sensors and z. B. on different display units to represent. In addition, one or more measurement signals for controlling the Serve cooking process. Leave the signals emitted by the transmitter units are clearly different from each other, so that the user can Measured variable of each sensor is informed.
  • the invention is designed so that a Transmitter / sensor unit begins signal transmission as soon as it is switched into an inductive one Field is introduced.
  • temperature distributions in the Detect food or, for example, on a grill surface can also a change in quantity can be determined.
  • the measured temperature profiles serve to control the heating surface.
  • the inductive cooker according to the invention for heating cookware has Means for controlling the heating power and at least one sensor Temperature measurement on.
  • the output signal of the at least one sensor is one Control variable for the means for regulation.
  • the at least one sensor is immediate attachable in or with the food.
  • the cooker contains a display unit visual representation of the output signal of the at least one sensor.
  • the inventive method for heating food uses one inductive cooker according to the invention, which means for controlling the Contains heating power and at least one sensor for temperature measurement.
  • the output signal of the at least one sensor is used as a manipulated variable for the means used for regulation.
  • the at least one sensor is directly in or at Cookware attached.
  • the output signal of the at least one sensor is determined using a display unit on the inductive hob is shown visually.
  • Figure 1 shows schematically an inductive cooker 1 with a partially cut pan 2 in a perspective view.
  • a magnetic field (not shown in detail) is generated under a hob 3. This causes an inductive heating of a pan base 10.
  • a plurality of sensors 19.1, 19.2, 19.3 are accommodated in a sensor rod 20 and releasably connected to the inductive cooker 1 by means of a cable 21 via a plug connection 22.
  • the signals from sensors 19.1, 19.2, 19.3 are evaluated individually or by averaging. By attaching several sensors, a higher resolution of the temperature stratification in the food can be achieved, respectively. a statement about the filling quantity or the change in the filling quantity in the pan (for example during a boiling process).
  • the temperature of the food to be cooked measured by sensors 19.1, 19.2, 19.3 is shown here on a display unit 23.
  • the signals are used to regulate the cooking process.
  • the desired temperature respectively.
  • the current cooking output of the inductive cooker is shown on a bar display 25.
  • the sensor signals from sensors 19.1, 19.2, 19.3 provide information about the im Existing temperature profile. If there is one for the food harmful temperature distribution will specifically influence the course of the inductive field of the cooker 1 taken.
  • the inductive field is here four coils 4.1, 4.2, 4.3, 4.4 arranged under the cooktop 3 are produced, each operated by an individual generator (not shown).
  • the Pan 2 lies in the sphere of influence of several coils 4.1, 4.2, 4.3, 4.4.
  • the heating output for example of the coils 4.3 and 4.4 increased compared to the coils 4.1 and 4.2, so that a temperature regulating flow, represented schematically by arrow F, in a cookware (not shown) arises.
  • FIG. 2 shows a further preferred embodiment of an inductive cooker 1 with a pan 2, which stands on a hob 3 with a pan base 10.
  • the pan 2 has a thermally insulating handle 11 which has a cavity 12.
  • the cavity 12 is closed with a plug 13.
  • the cooker 1 here has two display units 23.1 and 23.2, which are used for the simultaneous display of a plurality of sensor signals.
  • FIG. 3 shows an enlarged view of the handle 11 from FIG. 2.
  • a sensor 19, electronic means 18, a coil 17 and an antenna 16 are located in the cavity of the handle 11.
  • the electronic means 18 are used to evaluate and transmit the measurement signals from the sensor 19 , which lies directly in the effective range of a food 15.
  • the effective range of the sensor 19 is shown here by arrows T.
  • the coil 17 serves to supply power to the electronic means 18 and the sensor 19. It obtains its energy from an inductive field, for example the hob, which is shown schematically by the field lines L.
  • the measurement signals are transmitted in analog or digital form via a radio signal emitted via an antenna 16 to a receiving unit (not shown in more detail) in the cooker, from where they are used to control the cooking process.
  • the energy supply of the electronic means 18 and the sensor 19 can also be ensured via another energy source, for example a battery or an accumulator.
  • the receiver unit which is advantageously accommodated in the cooker, is designed in such a way that it can distinguish and receive the signals from several sensors if required.
  • the temperatures measured by at least one sensor 19 are shown on display units 23.1, 23.2 (cf. FIG. 2) and / or are used to control or regulate the cooking process.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Cookers (AREA)

Abstract

The hob (1) has a sensor rod (21) with at least one temperature sensor (19.1-19.3), which is inserted in the food to be cooked, whose output signal is used to control the hob. The cooking hob has a visual display (23) to output the sensor signal. An Independent claim is included for a method for heating food, etc., using the cooking hob.

Description

Die vorliegende Erfindung betrifft einen induktiven Kochherd und ein Verfahren zur Erwärmung von Kochgut gemäss den Oberbegriffen der unabhängigen Patentansprüche.The present invention relates to an inductive cooker and a method for Heating of food according to the generic terms of the independent Claims.

In der professionellen Gastronomie beeinflusst die Temperatur und die Temperaturführung die Qualität der Speisen massgeblich. Beispielsweise Fleisch, Fisch und Saucen müssen in einem sehr engen Temperaturrahmen verarbeitet werden, damit die optimale Geschmacksentfaltung zur Geltung kommt.In professional gastronomy, the temperature and the Temperature control significantly affects the quality of the food. For example meat, Fish and sauces must be processed in a very narrow temperature range be so that the optimal taste development comes into its own.

Aus dem Stand der Technik sind verschiedene Kochsysteme bekannt. Neben den konventionellen Gas- und Elektroherden erfreuen sich induktive Kochherde immer grösserer Beliebtheit. Der Vorteil der induktiven Erhitzung besteht dabei darin, dass die Hitze direkt im Pfannenboden unmittelbar beim Kochgut und nur dort entsteht. Die restlichen Herdteile werden nur unwesentlich erhitzt. Dadurch kennt dieses Kochprinzip im Unterschied zu Elektroherden keine Trägheit, so dass sich eine Veränderung der Kochleistung direkt und ohne Verzögerung auf das Kochgut auswirkt. Eine ähnliche Charakteristik weisen Gasherde auf Diese haben aber andere Nachteile wie bspw. Explosionsgefahr durch austretendes Gas, offene Flammen, Gasleitungen, Anbrennen von überlaufendem Kochgut, heisse Abgase, usw. Various cooking systems are known from the prior art. In addition to the Conventional gas and electric cookers always enjoy inductive cookers more popular. The advantage of inductive heating is that the heat directly in the pan bottom directly at the food and only arises there. The remaining parts of the stove are only slightly heated. Because of this knows this In contrast to electric cookers, the cooking principle is not sluggish, so there is one Change the cooking output directly and without delay to the food affects. Gas stoves have a similar characteristic, but others have them Disadvantages such as the risk of explosion from escaping gas, open flames, Gas lines, burning of overflowing food, hot exhaust gases, etc.

Induktive Kochherde bedürfen einer Überwachung oder Regelung der Temperatur. Bei den aus dem Stand der Technik bekannten induktiven Kochherden erfolgt eine Temperaturmessung auf der Unterseite einer Keramik- oder Glasplatte die als Träger für Pfanne und Kochgut dient. Aufgrund der Materialdicke und schlechten Wärmeleitfähigkeit dieser Platte dauert es sehr lange, bis eine Änderung der Temperatur registriert wird. Dies ist ein grosser Nachteil, da das Kochgut unter Umständen schon lange überhitzt, bevor ein Bediener oder ein eventuell vorhandener Temperaturregelkreis wirksam eingreifen kann. Die aus dem Stand der Technik bekannten induktiven Kochherde nutzen also die besondere, trägheitslose Charakteristik des induktiven Erhitzens nicht optimal. Ausserdem wird üblicherweise die gemessene Temperatur nicht direkt angezeigt, so dass sich der Bediener nur vage Vorstellungen über die effektive Temperatur des Kochgutes machen kann.Inductive cookers require monitoring or regulation of the temperature. In the inductive cooking stoves known from the prior art, a Temperature measurement on the underside of a ceramic or glass plate as a carrier for pan and food. Because of the material thickness and bad Thermal conductivity of this plate takes a long time to change Temperature is registered. This is a major disadvantage since the food is under Possibly overheated long before an operator or any existing operator Temperature control loop can intervene effectively. The state of the art Well-known inductive cookers use the special, inertia Characteristic of inductive heating is not optimal. In addition, usually the measured temperature is not displayed directly, so that the operator is only vaguely Can make ideas about the effective temperature of the food.

Es ist Aufgabe der vorliegenden Erfindung, die dem oben erwähnten Stand der Technik anhaftenden Nachteile zu vermeiden. Die Aufgabe wird durch den erfindungsgemässen induktiven Kochherd und das erfindungsgemässe Verfahren zum Erwärmen von Kochgut gelöst, wie sie in den unabhängigen Patentansprüchen definiert sind.It is an object of the present invention that the above-mentioned prior art Avoid technology-inherent disadvantages. The task is carried out by the inductive cooker according to the invention and the method according to the invention solved for heating cookware, as in the independent claims are defined.

Die Lösung der technischen Aufgabe wird insbesondere dadurch erreicht, dass eine Temperaturänderung des Kochgutes verzögerungsfrei gemessen, übertragen, ausgewertet und angezeigt wird. Um eine optimale, verzögerungsfreie Temperaturänderung des Kochgutes festzustellen, müssen die signalgebenden Sensoren so angebracht sein, dass sie exakt denselben Veränderungen unterliegen wie das Kochgut. Eine isolierende Abschirmung durch andere Elemente ist schlecht und wirkt verzögernd auf das Resultat. Die hier offenbarte Erfindung löst die gestellte Aufgabe auf eine einfache Weise. Dabei werden signalgebende Sensoren so plaziert, dass sie denselben Einflüssen unterliegen wie das Kochgut. In der Praxis bedeutet dies, dass sie "mitgekocht" werden. Die Signalübermittlung zwischen Sensor und einer Auswerteeinheit wird so optimiert, dass keine nachteilige Einschränkung resultiert. Ausserdem werden die relevanten Daten auf einer Anzeigeeinheit so visuell dargestellt, dass sie für den Bediener eindeutig und verzögerungsfrei aktualisiert als Ist-Werte erkennbar sind. Der Bediener hat vorzugsweise auch die Möglichkeit, einen Soll-Wert für die Temperatur einzugeben, welcher ebenfalls angezeigt werden kann. Die relevanten Daten werden in einem Soll-/Ist-Vergleich miteinander verglichen und für die Temperaturregelung verwendet.The technical problem is solved in particular by the fact that a Temperature change of the food to be measured measured without delay, transmitted, is evaluated and displayed. For an optimal, delay-free To determine the temperature change of the food to be cooked, the signaling Sensors are attached so that they are subject to exactly the same changes like the food. Insulating shielding by other elements is bad and has a delaying effect on the result. The invention disclosed here solves the task in a simple way. This is how signaling sensors become placed that they are subject to the same influences as the food. In practice it means that they are "cooked". The signal transmission between Sensor and an evaluation unit is optimized so that no disadvantage Restriction results. In addition, the relevant data is stored on a Display unit so visually represented that it is clear and for the operator updated without delay as actual values are recognizable. The operator has preferably also the possibility of entering a target value for the temperature, which can also be displayed. The relevant data are stored in one Target / actual comparison compared and for temperature control used.

Die signalgebenden Sensoren liefern mindestens ein elektrisches Signal, welches einerseits zur Steuerung einer Temperaturanzeige und andererseits der Regelung des Kochvorganges dienen. Durch eine aktive Regelung des Kochvorganges mittels einem Mikroprozessor kann ein optimaler und aus regelungstechnischer Sicht gesehen stabiles System erreicht werden. Insbesondere wird der Stellmechanismus des Regelkreises vorteilhafter Weise mit einer sehr kurzen Reaktionszeit ausgelegt, ohne dass die Gefahr besteht, dass das gesamte System zu instabilem Verhalten oder gar zum Aufschaukeln neigt. Bei herkömmlichen Kochherden, die mit einem Regelkreis ausgestattet sind, bei dem die Sensoren nicht unmittelbar auf das Kochgut wirken, ist die Reaktionszeit für eine Temperaturänderung aufgrund der Trägheit des Systems begrenzt. Diese darf nicht kürzer sein als die Zeit, die vergeht, bis eine Temperaturänderung durch die signalgebenden Sensoren registriert wird. Falls diese Zeit unterschritten wird, neigt das System zu instabilem Verhalten.The signaling sensors deliver at least one electrical signal, which on the one hand to control a temperature display and on the other hand to regulate the Serve cooking process. By actively regulating the cooking process by means of A microprocessor can be an optimal one from a control point of view seen stable system can be achieved. In particular, the adjusting mechanism the control loop is advantageously designed with a very short reaction time, without the risk of the entire system becoming unstable or even tends to rock. With conventional cookers that use a Control loop are equipped in which the sensors are not directly on the food act, is the reaction time for a temperature change due to the inertia of the System limited. This must not be shorter than the time that passes until one Temperature change is registered by the signaling sensors. If this If the time falls short, the system tends to behave unstably.

Die signalgebenden Sensoren werden vorteilhafterweise im Kochgut oder unmittelbar daneben plaziert. Falls es sich um ein flüssiges Kochgut handelt, wie bspw. eine Sauce oder eine Creme, werden die Sensoren mittels einer Messsonde in dieses eingefügt. Bei festem Kochgut, wie bspw. Fleisch, werden die Sensoren im Inneren des Kochgutes oder im Bereich der Auflagefläche des Kochgutes angebracht. The signaling sensors are advantageously in the food or placed immediately next to it. If it is a liquid cooked food, such as For example, a sauce or a cream, the sensors are in a measuring probe this inserted. With solid food, such as meat, the sensors in the Inside the food or in the area of the surface of the food appropriate.

Die von den Sensoren erzeugten Messsignale, betreffen typischerweise die Temperatur, die Feuchtigkeit oder andere Messgrössen. Die Messsignale werden an eine Mikroprozessor gesteuerte Elektronik übergeben, die daraus Soll-/Ist-Abweichung, Stellgrösse und Anzeigewert berechnet. Der Benutzer bestimmt durch Vorgabe die Sollgrösse der Temperatur, die auf einer Anzeige angezeigt wird. Auf demselben oder einer weiteren Anzeige wird die effektiv gemessene Temperatur des Kochgutes festgehalten. Um eine optimales Gelingen des Kochgutes zu garantieren, werden bei Bedarf mehrere Sensoren eingesetzt. Die Leistung des induktiven Kochherdes wird auf einer separaten Anzeige angezeigt, so dass der Benutzer auf einen Blick erkennt, wieviel die momentane Kochleistung im Vergleich zur maximalen Kochleistung beträgt.The measurement signals generated by the sensors typically relate to the Temperature, humidity or other parameters. The measurement signals are on a microprocessor-controlled electronics hand over the resulting target / actual deviation, The manipulated variable and display value are calculated. The user determines by Specification of the setpoint of the temperature that is shown on a display. On the same or another display shows the effectively measured temperature of the Cookware held. To guarantee optimal success of the food, If necessary, several sensors are used. The performance of the inductive Cooking range is shown on a separate display, so the user turns on at a glance recognizes how much the current cooking output compared to maximum cooking power is.

Die Übermittlung der Sensorsignale zwischen Sensor und Auswerteeinheit erfolgt auf unterschiedliche Weise. Bei einer ersten Klasse der erfindungsgemässen induktiven Kochherde werden die Sensoren mittels Kabelverbindung mit der Auswerte- und Anzeigeeinheit verbunden. Durch dieses Kabel werden die Sensoren mit Strom versorgt, sowie das oder die Sensorsignale übertragen. Die Datenübermittlung erfolgt dabei als analoges oder digitales Signal. Die Kabel der Sensoren werden vorteilhafterweise mittels Steckern mit dem Kochherd verbunden. Sind die Sensoren nicht mit dem Kochherd verbunden, erfolgt die Temperaturüberwachung über einen fest mit dem Kochherd verbundenen Sensor der vorteilhafter Weise im Bereich des Pfannenbodens angebracht wird. Dieser Sensor dient in der Regel auch als Überhitzungsschutz für den Kochherd.The sensor signals are transmitted between the sensor and the evaluation unit in different ways. In a first class of the inventive inductive cookers, the sensors are connected by cable to the Evaluation and display unit connected. Through this cable the sensors supplied with power, and transmit the sensor signal (s). The Data is transmitted as an analog or digital signal. The cables of the Sensors are advantageously connected to the cooker by means of plugs. If the sensors are not connected to the cooker, this is done Temperature monitoring via a sensor that is permanently connected to the cooker is advantageously attached in the region of the pan base. This sensor usually also serves as overheating protection for the cooker.

Bei einer weiteren Klasse der erfindungsgemässen induktiven Kochherde wird als Alternative zu den Kabelverbindungen eine besonders vorteilhafte Form der Datenübermittlung zwischen Sensor und Auswerteeinheit resp. Anzeigeeinheit verwendet, die ausserdem das induktive magnetische Feld gezielt ausnützen kann. Um eine ideale Platzierung der Sensoren zu garantieren, darf die Datenübermittlung keine einschränkende Wirkung haben. Aus diesem Grund werden die Daten bei dieser Variante ohne direkte Kabelverbindung, z. B. mittels analoger oder digitaler Funksignale übermittelt. Zu diesem Zweck wird der mindestens eine Sensor, welcher die relevanten Messgrössen ermittelt, mit mindestens einer Sendeeinheit gekoppelt. Diese Sendeeinheit übermittelt ein Signal, welches mit den gemessenen Grössen eineindeutig korreliert. Das ausgesendete Signal wird anschliessend durch einen Empfänger erfasst und nach einer geeigneten Aufbereitung der Auswertung, Anzeige und Steuerung zugeführt.In a further class of inductive cooking stoves according to the invention, as Alternative to the cable connections a particularly advantageous form of Data transmission between sensor and evaluation unit resp. Display unit used, which can also make targeted use of the inductive magnetic field. In order to guarantee an ideal placement of the sensors, the data transmission may have no restrictive effect. For this reason, the data is at this variant without a direct cable connection, e.g. B. by means of analog or digital Radio signals transmitted. For this purpose, the at least one sensor, which the relevant measurement parameters are determined, coupled to at least one transmission unit. This transmission unit transmits a signal which corresponds to the measured quantities clearly correlated. The transmitted signal is then replaced by a Recipient recorded and after a suitable preparation of the evaluation, display and control supplied.

Die Energieversorgung der Sendeeinheit erfolgt beispielsweise über Energiespeicher wie Batterien oder Akkumulatoren. Eine weitere, sehr elegante und besonders vorteilhafte Möglichkeit besteht aber in der gezielten Ausnutzung des ohnehin vorhandenen induktiven Feldes durch eine Spule. Diese Spule wird gezielt so platziert, dass in ihr durch das induktive Feld eine Spannung induziert wird. Diese Spannung wir als Energieversorgung zur Erfassung der Messgrössen und zur Datenübermittlung eingesetzt.The transmitter unit is supplied with energy, for example, via energy stores such as batteries or accumulators. Another very elegant and special An advantageous possibility is the targeted use of the anyway existing inductive field by a coil. This coil is targeted like this placed that a voltage is induced in it by the inductive field. This Voltage as an energy supply for recording the measured variables and for Data transmission used.

Die Sendeeinheiten und die Empfangseinheit sind so konzipiert, dass mehrere Messsignale gleichzeitig unterschieden und ausgewertet werden. So ist es möglich, verschiedene Sensoren gleichzeitig einzusetzen und dabei die Signale der einzelnen Sensoren zu unterscheiden und z. B. auf verschiedenen Anzeigeeinheiten darzustellen. Ausserdem kann eines oder mehrere Messsignale zur Steuerung des Kochvorganges dienen. Die von den Sendeeinheiten ausgestrahlten Signale lassen sich eindeutig von einander unterscheiden, so dass der Benutzer jederzeit über die Messgrösse jedes Sensors informiert ist. Die Erfindung ist so ausgelegt, dass eine Sende-/Sensoreinheit mit der Signalübermittlung beginnt, sobald sie in ein induktives Feld eingebracht wird. The transmitter units and the receiver unit are designed so that several Measurement signals are differentiated and evaluated at the same time. So it is possible use different sensors at the same time and the signals of the individual Differentiate sensors and z. B. on different display units to represent. In addition, one or more measurement signals for controlling the Serve cooking process. Leave the signals emitted by the transmitter units are clearly different from each other, so that the user can Measured variable of each sensor is informed. The invention is designed so that a Transmitter / sensor unit begins signal transmission as soon as it is switched into an inductive one Field is introduced.

Bei der Verwendung mehrerer Sensoren lassen sich Temperaturverteilungen im Kochgut oder beispielsweise auf einer Grillfläche feststellen. Ausserdem kann auch eine Mengenänderung festgestellt werden. Die gemessenen Temperaturprofile dienen zur Regelung der Heizfläche.When using multiple sensors, temperature distributions in the Detect food or, for example, on a grill surface. It can also a change in quantity can be determined. The measured temperature profiles serve to control the heating surface.

Die Erfindung lässt sich also wie folgt zusammenfassen.The invention can thus be summarized as follows.

Der erfindungsgemässe induktive Kochherd zur Erwärmung von Kochgut weist Mittel zur Regelung der Heizleistung und mindestens einen Sensor zur Temperaturmessung auf. Das Ausgangssignal des mindestens einen Sensors ist eine Stellgrösse für die Mittel zur Regelung. Der mindestens eine Sensor ist unmittelbar im oder beim Kochgut anbringbar. Der Kochherd enthält eine Anzeigeeinheit zur visuellen Darstellung des Ausgangssignals des mindestens eines Sensors.The inductive cooker according to the invention for heating cookware has Means for controlling the heating power and at least one sensor Temperature measurement on. The output signal of the at least one sensor is one Control variable for the means for regulation. The at least one sensor is immediate attachable in or with the food. The cooker contains a display unit visual representation of the output signal of the at least one sensor.

Das erfindungsgemässe Verfahren zur Erwärmung von Kochgut verwendet einen erfindungsgemässen induktiven Kochherd, welcher Mittel zur Regelung der Heizleistung und mindestens einen Sensor zur Temperaturmessung enthält. Das Ausgangssignal des mindestens einen Sensors wird als eine Stellgrösse für die Mittel zur Regelung verwendet. Der mindestens eine Sensor wird unmittelbar im oder beim Kochgut angebracht. Das Ausgangssignal des mindestens eines Sensors wird mittels einer Anzeigeeinheit auf dem induktiven Kochherd visuell dargestellt.The inventive method for heating food uses one inductive cooker according to the invention, which means for controlling the Contains heating power and at least one sensor for temperature measurement. The The output signal of the at least one sensor is used as a manipulated variable for the means used for regulation. The at least one sensor is directly in or at Cookware attached. The output signal of the at least one sensor is determined using a display unit on the inductive hob is shown visually.

Anhand der nachfolgend aufgeführten Figuren wird eine bevorzugte Ausführungsform der Erfindung im Detail diskutiert.

  • Fig. 1 zeigt einen induktiven Kochherd mit Pfanne, Sensor und Kabelverbindung in perspektivischer Ansicht.
  • Fig. 2 zeigt einen weiteren induktiven Kochherd mit Pfanne in perspektivischer Ansicht.
  • Fig. 3 zeigt eine Schnittdarstellung durch den Griff einer teilweise weggeschnittenen Pfanne.
    • A preferred embodiment of the invention is discussed in detail with reference to the figures listed below.
  • Fig. 1 shows an inductive cooker with pan, sensor and cable connection in a perspective view.
  • Fig. 2 shows a further inductive cooker with pan in a perspective view.
  • Fig. 3 shows a sectional view through the handle of a partially cut pan.

    • Figur 1 zeigt schematisch einen induktiven Kochherd 1 mit einer teilweise aufgeschnittenen Pfanne 2 in perspektivischer Darstellung. Unter einem Kochfeld 3 wird ein magnetisches Feld (nicht näher dargestellt) erzeugt. Dieses bewirkt eine induktive Erhitzung eines Pfannenbodens 10. Mehrere Sensoren 19.1, 19.2, 19.3 sind in einem Sensorstab 20 untergebracht und mittels einem Kabel 21 über eine Steckverbindung 22 lösbar mit dem induktiven Kochherd 1 verbunden. Die Signale der Sensoren 19.1, 19.2, 19.3 werden einzeln oder durch Mittelwertbildung ausgewertet. Durch Anbringen mehrerer Sensoren kann zudem eine höhere Auflösung der Temperaturschichtung im Kochgut erreicht, resp. eine Aussage über die Füllmenge oder die Änderung der Füllmenge in der Pfanne gemacht werden (beispielsweise bei einem Einkochvorgang). Die durch die Sensoren 19.1, 19.2, 19.3 gemessene Temperatur des Kochgutes wird hier auf einer Anzeigeeinheit 23 angezeigt. Die Signale dienen zum Regeln des Kochvorganges. Mittels Bedienelemente 24 wird die gewünschte Temperatur, resp. Temperaturverlauf oder Kochprogramm gewählt. Die momentane Kochleistung des induktiven Kochherdes wird über eine Balkenanzeige 25 dargestellt. Figure 1 shows schematically an inductive cooker 1 with a partially cut pan 2 in a perspective view. A magnetic field (not shown in detail) is generated under a hob 3. This causes an inductive heating of a pan base 10. A plurality of sensors 19.1, 19.2, 19.3 are accommodated in a sensor rod 20 and releasably connected to the inductive cooker 1 by means of a cable 21 via a plug connection 22. The signals from sensors 19.1, 19.2, 19.3 are evaluated individually or by averaging. By attaching several sensors, a higher resolution of the temperature stratification in the food can be achieved, respectively. a statement about the filling quantity or the change in the filling quantity in the pan (for example during a boiling process). The temperature of the food to be cooked measured by sensors 19.1, 19.2, 19.3 is shown here on a display unit 23. The signals are used to regulate the cooking process. The desired temperature, respectively. Temperature curve or cooking program selected. The current cooking output of the inductive cooker is shown on a bar display 25.

    Die Sensorsignale der Sensoren 19.1, 19.2, 19.3 geben Aufschluss über das im Kochgut vorhandene Temperaturprofil. Bei Vorliegen einer für das Kochgut schädlichen Temperaturverteilung wird gezielt Einfluss auf den Verlauf des induktiven Feldes des Kochherdes 1 genommen. Das induktive Feld wird hier durch vier unter dem Kochfeld 3 angeordneten Spulen 4.1, 4.2, 4.3, 4.4 erzeugt, die je durch einen individuellen Generator (nicht näher dargestellt) betrieben werden. Die Pfanne 2 liegt dabei im Einflussbereich mehrerer Spulen 4.1, 4.2, 4.3, 4.4. Bei Vorliegen eines ungünstigen Temperaturprofils wird die Heizleistung beispielsweise der Spulen 4.3 und 4.4 gegenüber der Spulen 4.1 und 4.2 erhöht, so dass eine temperaturregulierende Strömung, schematisch dargestellt durch den Pfeil F, in einem Kochgut (nicht näher dargestellt) entsteht.The sensor signals from sensors 19.1, 19.2, 19.3 provide information about the im Existing temperature profile. If there is one for the food harmful temperature distribution will specifically influence the course of the inductive field of the cooker 1 taken. The inductive field is here four coils 4.1, 4.2, 4.3, 4.4 arranged under the cooktop 3 are produced, each operated by an individual generator (not shown). The Pan 2 lies in the sphere of influence of several coils 4.1, 4.2, 4.3, 4.4. At If there is an unfavorable temperature profile, the heating output, for example of the coils 4.3 and 4.4 increased compared to the coils 4.1 and 4.2, so that a temperature regulating flow, represented schematically by arrow F, in a cookware (not shown) arises.

    Figur 2 zeigt eine weitere bevorzugte Ausführungsform eines induktiven Kochherdes 1 mit einer Pfanne 2, die mit einem Pfannenboden 10 auf einem Kochfeld 3 steht. Die Pfanne 2 besitzt einem thermisch isolierenden Griff 11, der einen Hohlraum 12 aufweist. Der Hohlraum 12 ist mit einem Verschlussstopfen 13 verschlossen. Zur besseren Veranschaulichung ist die Pfanne 2 und der Griff 11 teilweise aufgeschnitten. Der Kochherd 1 weist hier zwei Anzeigeeinheiten 23.1 und 23.2 auf, die zur gleichzeitigen Anzeige von mehreren Sensorsignalen dienen. FIG. 2 shows a further preferred embodiment of an inductive cooker 1 with a pan 2, which stands on a hob 3 with a pan base 10. The pan 2 has a thermally insulating handle 11 which has a cavity 12. The cavity 12 is closed with a plug 13. For better illustration, the pan 2 and the handle 11 are partially cut open. The cooker 1 here has two display units 23.1 and 23.2, which are used for the simultaneous display of a plurality of sensor signals.

    Figur 3 zeigt eine vergrösserte Ansicht des Griffs 11 aus Figur 2. Im Hohlraum des Griffs 11 befindet sich ein Sensor 19, elektronische Mittel 18, eine Spule 17 und eine Antenne 16. Die elektronischen Mittel 18 dienen zur Auswertung und Übermittlung der Messsignale des Sensors 19, der unmittelbar im Wirkbereich eines Kochgutes 15 liegt. Der Wirkbereich des Sensors 19 ist hier durch Pfeile T dargestellt. Die Spule 17 dient der Stromversorgung der elektronischen Mittel 18 und des Sensors 19. Sie gewinnt ihre Energie aus einem induktiven Feld, beispielsweise dem Kochfeld, welches schematisch durch die Feldlinien L dargestellt ist. Die Messsignale werden analog oder digital über ein über eine Antenne 16 abgestrahltes Funksignal an eine Empfangseinheit (nicht näher dargestellt) im Kochherd übermittelt, von wo sie zur Steuerung des Kochvorgangs dienen. Die Energieversorgung der elektronischen Mittel 18 und des Sensors 19 kann auch über eine andere Energiequelle, beispielsweise eine Batterie oder einen Akkumulator sichergestellt werden. Die vorteilhafterweise im Kochherd untergebrachte Empfangseinheit ist so ausgelegt, dass sie bei Bedarf die Signale von mehreren Sensoren unterscheiden und empfangen kann. Die von mindestens einem Sensor 19 gemessenen Temperaturen werden auf Anzeigeeinheiten 23.1, 23.2 (vgl. Figur 2) dargestellt und/oder dienen zur Steuerung oder Regelung des Kochvorgangs. FIG. 3 shows an enlarged view of the handle 11 from FIG. 2. A sensor 19, electronic means 18, a coil 17 and an antenna 16 are located in the cavity of the handle 11. The electronic means 18 are used to evaluate and transmit the measurement signals from the sensor 19 , which lies directly in the effective range of a food 15. The effective range of the sensor 19 is shown here by arrows T. The coil 17 serves to supply power to the electronic means 18 and the sensor 19. It obtains its energy from an inductive field, for example the hob, which is shown schematically by the field lines L. The measurement signals are transmitted in analog or digital form via a radio signal emitted via an antenna 16 to a receiving unit (not shown in more detail) in the cooker, from where they are used to control the cooking process. The energy supply of the electronic means 18 and the sensor 19 can also be ensured via another energy source, for example a battery or an accumulator. The receiver unit, which is advantageously accommodated in the cooker, is designed in such a way that it can distinguish and receive the signals from several sensors if required. The temperatures measured by at least one sensor 19 are shown on display units 23.1, 23.2 (cf. FIG. 2) and / or are used to control or regulate the cooking process.

    Claims (10)

    Induktiver Kochherd (1) zur Erwärmung von Kochgut (15), mit Mitteln zur Regelung der Heizleistung und mit mindestens einem Sensor (19.1-19.3) zur Temperaturmessung, dessen Ausgangssignal eine Stellgrösse für die Mittel zur Regelung ist, dadurch gekennzeichnet, dass der mindestens eine Sensor (19.1-19.3) unmittelbar im oder beim Kochgut (15) anbringbar ist und dass der Kochherd (1) eine Anzeigeeinheit (23) zur visuellen Darstellung des Ausgangssignals des mindestens eines Sensors (19.1-19.3) enthält.Inductive cooker (1) for heating food (15), with means for regulating the heating power and with at least one sensor (19.1-19.3) for temperature measurement, the output signal of which is a manipulated variable for the means for regulating, characterized in that the at least one Sensor (19.1-19.3) can be attached directly in or on the item to be cooked (15) and that the cooker (1) contains a display unit (23) for the visual display of the output signal of the at least one sensor (19.1-19.3). Induktiver Kochherd (1) nach Anspruch 1, dadurch gekennzeichnet, dass er zwecks Übermittlung des Ausgangssignals des mindestens einen Sensors (19.1-19.3) zu den Mitteln zur Regelung ein elektrisches Kabel (21) oder Mittel (16, 18) zur drahtlosen Datenübertragung enthält.Inductive cooker (1) according to claim 1, characterized in that it contains an electrical cable (21) or means (16, 18) for wireless data transmission for the purpose of transmitting the output signal of the at least one sensor (19.1-19.3) to the means for regulating. Induktiver Kochherd (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der mindestens eine Sensor (19.1-19.3) in einem Sensorstab (20) untergebracht ist.Inductive cooker (1) according to claim 1 or 2, characterized in that the at least one sensor (19.1-19.3) is housed in a sensor rod (20). Induktiver Kochherd (1) nach einem der Ansprüche 1-3, dadurch gekennzeichnet, dass er eine Induktionsspule (17) zur Energieversorgung des mindestens einen Sensors (19.1-19.3) enthält.Inductive cooker (1) according to any one of claims 1-3, characterized in that it contains an induction coil (17) for supplying energy to the at least one sensor (19.1-19.3). Induktiver Kochherd (1) nach einem der Ansprüche 1-4, dadurch gekennzeichnet, dass er mindestens ein Kochfeld (3) mit zwei oder mehr Induktionsspulen (4.1-4.4) aufweist. Inductive cooker (1) according to any one of claims 1-4, characterized in that it has at least one hob (3) with two or more induction coils (4.1-4.4). Verfahren zur Erwärmung von Kochgut (15) mit einem induktiven Kochherd (1) nach Anspruch 1, welcher Mittel zur Regelung der Heizleistung und mindestens einen Sensor (19.1-19.3) zur Temperaturmessung enthält, wobei das Ausgangssignal des mindestens einen Sensors (19.1-19.3) als eine Stellgrösse für die Mittel zur Regelung verwendet wird, dadurch gekennzeichnet, dass der mindestens eine Sensor (19.1-19.3) unmittelbar im oder beim Kochgut (15) angebracht wird und dass das Ausgangssignal des mindestens eines Sensors (19.1-19.3) mittels einer Anzeigeeinheit (23) auf dem induktiven Kochherd (1) visuell dargestellt wird.Method for heating food (15) with an inductive cooker (1) according to claim 1, which contains means for regulating the heating power and at least one sensor (19.1-19.3) for temperature measurement, the output signal of the at least one sensor (19.1-19.3) is used as a manipulated variable for the means for regulation, characterized in that the at least one sensor (19.1-19.3) is attached directly in or at the item to be cooked (15) and in that the output signal of the at least one sensor (19.1-19.3) is displayed (23) on the inductive cooker (1) is shown visually. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass das Ausgangssignal des mindestens einen Sensors (19.1-19.3) über ein Kabel oder mittel eines analogen oder digitalen Funksignals zu den Mitteln zur Regelung übermittelt wird.A method according to claim 6, characterized in that the output signal of the at least one sensor (19.1-19.3) is transmitted to the control means via a cable or by means of an analog or digital radio signal. Verfahren nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass Ausgangssignale mehrerer Sensoren (19.1-19.3) zur Bestimmung der Menge des Kochgutes (15), zur Bestimmung der zeitlichen Änderung der Menge des Kochgutes (15) und/oder zur Bestimmung der Temperaturverteilung im Kochgut (15) verwendet werden.Method according to Claim 6 or 7, characterized in that output signals from a plurality of sensors (19.1-19.3) for determining the amount of the food to be cooked (15), for determining the change over time in the amount of the food to be cooked (15) and / or for determining the temperature distribution in the food to be cooked (15) can be used. Verfahren nach einem der Ansprüche 6-8, dadurch gekennzeichnet, dass der mindestens eine Sensor (19.1-19.3) mittels einer Induktionsspule (17) mit Energie versorgt wird. Method according to one of claims 6-8, characterized in that the at least one sensor (19.1-19.3) is supplied with energy by means of an induction coil (17). Verfahren nach einem der Ansprüche 6-9, dadurch gekennzeichnet, dass eine Strömung in einem flüssigen Kochgut (15) durch inhomogenes Beheizen der Kochfläche erzeugt wird.Method according to one of claims 6-9, characterized in that a flow in a liquid food (15) is generated by inhomogeneous heating of the cooking surface.
    EP00810195A 1999-03-10 2000-03-08 Inductive cooktop with temperature control Withdrawn EP1037508A1 (en)

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    EP3216313A4 (en) * 2014-11-07 2018-07-11 Breville PTY Limited Cooktop
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    EP3216315A4 (en) * 2014-11-07 2018-06-27 Breville PTY Limited Cooktop
    US10362639B2 (en) 2014-11-07 2019-07-23 Breville Pty Limited Cooktop
    CN107113925A (en) * 2014-11-07 2017-08-29 布瑞威利私人有限公司 Cooking stove
    WO2016070233A1 (en) * 2014-11-07 2016-05-12 Breville Pty Limited Cooktop
    CN107251646B (en) * 2014-11-07 2020-10-09 布瑞威利私人有限公司 Kitchen range
    EP3616573A4 (en) * 2017-04-26 2020-09-16 LG Electronics Inc. -1- Smart kettle using induction heating
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    EP3890432A1 (en) 2020-03-30 2021-10-06 Groupe Brandt Hob comprising an improved cooking programme, cooking system, cooking method and corresponding programme
    FR3108821A1 (en) 2020-03-30 2021-10-01 Groupe Brandt COOKING PLATE INCLUDING AN IMPROVED COOKING PROGRAM, COOKING SYSTEM, COOKING PROCESS AND CORRESPONDING PROGRAM
    EP3992531A3 (en) * 2020-10-28 2022-10-19 Miele & Cie. KG Method for operating a cooking system, cooking utensil and control device

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